Cameo is all about stealth and evasion rather than direct attack. If any Decepticons get close, she immediately turns tail, leaving a cloud of choking nanite dust as she seeks a safer vantage point from which to shoot at them. When cornered, her savage attacks will leave Decepticons reeling, a result of the lightning reflexes she was manufactured with.
Cameo was among the Autobots who were on board the Arclight when it was shot down over Central City. She survived the crash and proceeded to take part in a series of battles against the Decepticons who had come aboard the Leviathan.